Upper Stillwater Reservoir

Quick Facts

Upper Stillwater Reservoir


(801) 379-1071

Map Directions

Things To Do


Upper Stillwater Dam and Reservoir, features of the Central Utah Project, Bonneville Unit, are are Rock Creek, about 31 miles northwest of Duchesne, Utah.Recreation management at Upper Stillwater Reservoir is under the jurisdiction of the U.S. Forest Service, Ashley National Forest. The Forest Service can be reached at (435) 738-2482. Situated northwest of Mountain Home, Utah, in a timber setting with an 8,170-foot elevation and a surface area of 330 acres. Managed recreation season is June through September with high use on holidays and weekends. Available fish species include rainbow, brown, and brook trout. Tworoose Pass U.S. Geological Service map covers the area. A campground nature trail exists. Reservations are accepted at certain campsites. Fees charged. Some stream fishing below the reservoir.

Map of Upper Stillwater Reservoir

Latitude, Longitude: 40.554505, -110.704165



  • Boating

    Boating and Water Sports --The Flaming Gorge National Recreation Area is a popular boating and water sport area. Boating ramps and marinas are located at several sites around the Lake. There are 26 campgrounds in the immediate area of the Gorge, four of which are accessible only by boat. Boaters and water sport enthusiasts should be especially careful since high winds may be encountered, and the waters of the Lake are cold. Know and obey all State and Federal regulations while using the Lake. The Green River below Flaming Gorge Dam also provides adventures for non-motorized water craft meeting state and federal regulations for river running. Twenty six miles of the Green River are open to approved water craft without permit. Permits from the National Park Service are needed for the 26 miles of the Green River within the Dinosaur National Monument.

  • Camping

    Camping available.

  • Fishing

    Fishing permitted

  • Hiking

    Hiking, Backpacking, and Horseback Riding --Over 1,000 miles of trail exist on the Ashley National Forest providing visitors with access to backcountry and wilderness areas. Trailhead locations for many of these trails are listed under trails. Parking, horse unloading facilities, and comfort stations exist at most trailhead locations.

  • Horseback Riding

    Horseback riding permitted.

  • Picnicking

    Picnic areas available.

  • RVing

    RVing permitted.

  • Winter Sports

    Cross Country Skiing, Snowmobiling, and other Winter Sports activities --There are areas and trails open to cross country skiing or snowmobile use. Two facilities called "Yurts" are available to rent for overnight stays by cross country skiers. The Yurts are about four to seven miles from the Flaming Gorge - Uintas Scenic Byway. Construction of other such facilities in various areas of the Forest is planned. Brochures about winter sports activities are available at Forest offices. Winter safety tips are included under the section entitled Safety and Health In the Forest.

Park Partners

Friends of the Forest

(503) 241-0467



Access is over improved gravel Forest Rd. 134. From Duchesne, go 22 miles to Mountain Home, then west on main highway to reservoir.

Phone Numbers


(801) 379-1071


(503) 241-0467

Road conditions

(503) 241-0467


(503) 241-0467